Question

Molecular mass is defined as the:
a.Mass of one atom compared with the mass of one molecule
b.Mass of one atom compared with the mass of one atom of hydrogen
c.Mass of one molecule of any substance compared with the mass of one atom of C – 12
d.None of the above​

Answer 1

Explanation:

Listen to pronunciation. (muh-LEH-kyoo-ler mas) The sum of the atomic masses of all atoms in a molecule, based on a scale in which the atomic masses of hydrogen, carbon, nitrogen, and oxygen are 1, 12, 14, and 16, respectively

Answer 2

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Solution:

Molecular mass is defined as the mass of one molecule of any substance compared with the mass of one atom of C-12

Knowledge Booster:

1. Molecular mass are also known as relative molecular mass
2. Molecular mass indicates how many times a molecule is heavier with comparison of 1/12th part of mass of carbon
3. By measuring with carbon, we get the relative mass not the actual mass. As we express atomic mass in amu( where amu is atomic mass unit) 1amu = 1.67 × 10^-24
4. We can obtain actual mass by multiplying the molecular mass with 1.67 × 10^-24
5. For example: Oxygen(O2) = 16 × 2 = 32amu [ molecular mass of oxygen is 16g]. Actual mass of oxygen= 32 × 1.67 × 10^-24 gm is actual mass of O2